Zcash price jumped more than 10 percent on Tuesday after Project Tachyon said it is moving closer to a formal proof for Zcash’s upcoming Ironwood shielded pool.
The update gave traders fresh reason to watch ZEC after weeks of concern around the earlier Orchard bug.
At the time of writing, Zcash traded at around $500, up more than 10 percent over 24 hours. The token had a market cap of $8.39 billion and a 24-hour trading volume of $484.63 million (based on The Coin Headlines market data).
The move pushed ZEC back toward the key $500 area, a level that traders have watched since the token’s earlier rally lost speed. Recently, Zcash had already tested resistance above $500 after a security validation rally, before sellers forced the price back under that level.
However, the latest rebound came with a clearer technical driver. Project Tachyon’s update gave the market a new reason to focus on whether Zcash can address concerns around hidden supply risk in its shielded pools.
Project Tachyon targets counterfeiting risk
Project Tachyon said in a July 7 blog post that the recently found Orchard flaw was patched and that developers believe no exploitation occurred. However, it also said the privacy design of Zcash made the issue harder to resolve because any exploit would have been difficult to detect through normal chain review.
The group said Ironwood is based on Orchard but starts fresh with the flaw patched. It also said the protocol will include a turnstile mechanism that can help wallets move funds from Orchard to Ironwood, while old Orchard payments will be disabled to limit the supply that can remain in the older pool.
Project Tachyon said its formal verification work aims to rule out undetectable counterfeiting bugs in Ironwood. The team said it is using tools such as Lean, while human-guided language models could shorten proof generation from years to weeks in complex cryptographic systems.
In addition, Zcash founder Zooko Wilcox said the project is “on the verge of producing a mathematical proof that there are no undetectable counterfeiting bugs in the latest Zcash shielded pools.”
At the same time, Sean Bowe’s post gave more technical context on the verification work behind Ironwood. The update added to market attention around Zcash’s attempt to address the same type of hidden counterfeiting risk that affected Orchard.
Orchard bug remains key to the rally
The new proof effort follows the Orchard vulnerability that shook confidence in Zcash last month. As previously reported by The Coin Headlines, the bug raised concern because it could have allowed counterfeit ZEC to be created inside the shielded pool without a clear public trace.
Moreover, ZEC dropped about 30 percent after the bug became public. The market reaction came from the unknown, since Zcash’s privacy features made it difficult to prove whether counterfeit coins had ever been created.
Project Tachyon’s latest update speaks directly to that concern. In public blockchains such as Bitcoin, transaction amounts are visible, so some counterfeiting bugs can be spotted and corrected through chain history.
Zcash’s shielded pools work differently because private transaction data stays hidden, while cryptography confirms that rules are followed.
That is why the Ironwood proof has become important for Zcash. It does not only address a software patch. It also tries to show that the new shielded pool cannot carry the same class of hidden supply risk.
ZEC tests key $500 resistance as momentum builds
The price reaction also comes after ZEC showed early signs of recovery near the $400 zone. ZEC had been defending support near $398 to $403 after several tests in late June and early July. That setup kept buyers focused on whether the token could reclaim higher levels.
Analyst commentary shared in the market also focused on the $480 to $500 region. Crypto analyst Ardi noted that many traders reacted strongly when he turned bearish near the top, but the price later dropped below $300.
He also pointed out that a confirmed break and hold above the compound resistance could support a move back above $500.
Another analyst, Celal Kucuker, said, “Zcash looks ready for something big. A daily close above $475 could send it straight toward a new ATH.”
Notably, technical indicators also showed short-term recovery momentum. RSI stood near 59, above its moving average at 47, showing stronger buying pressure without entering overbought territory.
The MACD also improved. The histogram was positive near 10.65, while the MACD line stood around minus 1.25 and stayed above the signal line near minus 11.90. This confirmed a bullish crossover and showed that bearish pressure had weakened.
Meanwhile, the Ironwood upgrade could face timing pressure because infrastructure providers may need more time to move from zcashd to the newer Z3 stack. Shielded Labs said exchanges, mining pools, and wallets may need more time to prepare, although no delay had been finalized at the time.
ZEC’s rebound depends on two main factors. Traders are watching whether the price can stay near or above $500, while the Zcash community waits for stronger proof that Ironwood can avoid the same hidden counterfeiting risk that affected Orchard.
The rally shows that confidence can return when developers show progress on core security concerns. However, the market still needs clear technical follow-through, smooth infrastructure readiness, and sustained demand before the recovery becomes stronger.
